Seven eighth, 7 over 8, 7/8, 0.875,
y = 4x - 3 would be it !!!!
a₅ = 10
a₁₀ = 20
a₁₅ = x
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Note that from a₅ to a₁₀, there is a addition of 10. This means that for every x(₅) jump, you add 10 to the whole number.
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So in this case:
a₁₀ = 20
a₁₅ = x
a₁₀ (+₅) = 20 (+10)
a₁₅ = 20 + 10
a₁₅ = 30
Note that: a₁₅ = x = 30
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x = 30, or (A) is your answer
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hope this helps
Expanding the right side:-
5x - 4 = 5x - 15 + 11
5x - 4 = 5x - 4
left side = right side so there are infinitely many solutions
Density of any object of found by dividing its Mass by its Volume
So firstly we have to find the Volume
Volume of sphere = 
where r is radius
So lets find the Volume
Volume of spherical marble = 
= 
Now mass = 10 grams
So density = Mass/Volume = 
rho
≈2.39 rho
